/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneSequenceUpdaters.h
Migrate this updater to one that can represent hierarchical data.
A new instance capable of dealing with hierarchical data, or nullptr if this already does.
[TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISequenceUpdater](API\Runtime\MovieScene\EntitySystem\ISequenceUpdater) > MigrateToHierarchical()